This problem happened after around the 1.8 update. (So for months but Ive been to lazy to fix it until now xD) So whenever I open Minecraft the launcher opens up and everything seems fine right? However, it loads and then re-opens saying this:

[15:33:53] [Client thread/INFO]: Setting user: Brandave
[15:33:53] [Client thread/INFO]: (Session ID is token:92f94e9256934d618cd9dd1d788b3710:78ba73a12acc4e769d694b3387f556f7)
[15:34:00] [Client thread/INFO]: LWJGL Version: 2.9.4
[15:34:02] [Client thread/INFO]: Reloading ResourceManager: Default
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1. A fatal error has been detected by the Java Runtime Environment:
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2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000000001b6be64d, pid=4024, tid=9024
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3. JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
4. Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
5. Problematic frame:
6. C [ig7icd64.dll+0x47e64d]
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7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
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8. An error report file with more information is saved as:
9. C:\Users\Brandon\AppData\Roaming\.minecraft\hs_err_pid4024.log
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10. If you would like to submit a bug report, please visit:
11. http://bugreport.sun.com/bugreport/crash.jsp
12. The crash happened outside the Java Virtual Machine in native code.
13. See problematic frame for where to report the bug.
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    Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release